Summary:
RCTSurfaceTouchHandler is a complete rewrite of RCTTouchHandler which uses direct Fabric-specific event dispatching pipeline and several new approaches to managing active events (such as high-performant C++ collections, better management of identifier pool, and so on).
Besides that, the new implementation is much more W3C compliant that it used to be (see old TODOs near `receiveTouches()` implementation in Javascript).
So, touch events work now!
Reviewed By: fkgozali
Differential Revision: D8246713
fbshipit-source-id: 218dc15cd8f982237de7e2497ff36a7bfe6d37cc
a32be38017